Heat the oil in a soup pot or Dutch oven over medium-high heat then add the chopped onion and carrot and cook for about 5 minutes or just until the carrot is tender and the onion is translucent.: Warmth from the olive oil will start to coax sweet aromas from the onion and carrot , and you should hear a gentle sizzle as the vegetables soften, releasing a faint, toasty scent. The visual cue is that the onion turns from opaque to translucent and the carrot yields easily to a fork, which signals readiness for the next step. Doing this slowly preserves sweetness, while rushing with too high heat can brown or burn the vegetables, introducing bitterness. If your oil smokes, lower the heat immediately and stir; it means the pan is too hot. Keep the pot covered loosely if you want to soften faster without color change, but uncover to let moisture escape if the vegetables steam instead of gently sauté.
Add the rice and chicken broth to the pot and bring to a boil. Reduce the heat to a simmer and cook for about 15 minutes or until the rice is cooked through.: You will feel a change as the pot goes from a gentle simmer to lively bubbles, and the aroma shifts toward the savory depth of the chicken broth . The grains of Arborio rice will swell and release starch as they cook, gradually thickening the liquid into a velvety body. Watch the transition from rolling boil to a steady simmer, because too vigorous a boil can break down the rice unevenly and make it gluey. A common mistake is adding too much liquid too quickly; instead maintain a controlled simmer so the rice cooks through evenly. Stir occasionally to prevent rice from sticking to the bottom of the pot.
Meanwhile in a small bowl beat the egg together with lemon juice.: During this simmer you will notice the broth turn more opaque as the Arborio rice releases starch, and the surface will show tiny shimmering bubbles. Test the rice by tasting a grain for tenderness; it should be creamy yet have a slight tooth, not mushy. If the rice feels firm at 15 minutes, continue simmering, adding small splashes of extra broth if necessary. Avoid covering the pot fully, because trapped steam can over soften the rice. Stir gently now and then to keep an even texture and to prevent clumping at the bottom.
Add the shredded chicken to the pot, then add about a ladle of the soup broth to the egg mixture and stir. Pour the egg mixture into the soup. You will notice the soup thickening up. Season with salt and pepper as needed and if you feel the soup needs more lemon, add more lemon juice as desired.: As you whisk the eggs and fresh lemon juice , the mixture will become pale and slightly frothy, and the citrus scent will brighten the kitchen. This beaten combo is the emulsion base that will give the soup its silky body, so whisk until the eggs are smooth and well combined. A typical pitfall is under whisking, which can lead to uneven incorporation and tiny curds later. Keep the bowl close at hand because you will temper the eggs with hot broth next, and make sure your bowl is at room temperature to reduce shocking the mixture.
Garnish with lots of dill, with some feta cheese and lemon slices if you prefer, then serve.: When you add shredded chicken to the simmering pot, you will hear a softer, more hush like sound compared to earlier bubbles, and the chicken will warm through quickly, releasing meaty, savory notes. The tempering step where you whisk a ladle of hot broth into the egg and lemon mixture is crucial because it raises the temperature of the eggs slowly so they do not scramble when returned to the pot. As you add the hot broth into the eggs, keep whisking so the mixture becomes warm and glossy. A common error is pouring the eggs back into the pot too quickly, which causes curdling; temper slowly and stop if the eggs begin to thicken prematurely, letting the ladle cool slightly.
Pour the egg mixture into the soup: Once tempered, the egg and lemon mixture will blend with the broth and create a smooth thickening effect rather than forming curds, and you may notice the soup become silkier and slightly more opaque. Pay attention to the texture; the broth should cling to the rice and form a cohesive body without becoming gelatinous. Stir gently in a slow, steady motion to integrate the emulsion uniformly. If the soup seems to separate or look grainy, lower the heat and stir continuously until the texture smooths; overheating is often the cause, so maintain a gentle warmth. Taste and adjust seasoning now to get the balance of salt and citrus right.
Season with salt and pepper as needed and if you feel the soup needs more lemon, add more lemon juice as desired: After the egg mixture is incorporated the flavors will open up, and you can start adjusting seasoning. The scent will be bright from the lemon juice and savory from the chicken broth , and a small pinch of salt or a twist of freshly cracked pepper can sharpen the profile. Add salt slowly because the broth may already carry sodium. A frequent mistake is over acidifying the soup; add extra lemon juice sparingly and taste between additions to keep the brightness balanced with the creamy body.
Garnish with lots of dill, with some feta cheese and lemon slices if you prefer, then serve: The final touch of chopped dill releases an herbaceous perfume that sits beautifully on top of the warm bowl, and the contrast of green against the pale broth is visually inviting. If you choose to add small crumbles of feta or a thin lemon slice, they provide a salty pop or an extra citrus note, but keep additions modest so they do not overpower the delicate emulsion. Serve immediately while the soup is warm and silky; reheating gently later will preserve texture, but avoid boiling which can separate the emulsion. A common serving mistake is letting the soup sit too long before garnishing, which dulls the fresh herb aroma.