Prepare veggies: Dice onion, carrot, and potato. Mince garlic.: The kitchen will smell fresh and slightly sweet as you chop the onion and carrot , with the potato giving a neutral, earthy aroma. Uniform dice ensures even cooking, so aim for similar sized pieces which will soften at the same rate. When you mince the garlic , you should notice a sharp, pungent scent that mellows when cooked. A common mistake here is uneven chopping, which leads to some pieces being underdone while others fall apart, so take a few extra minutes to match sizes and keep your knife technique steady.
Begin soup: In a stockpot over medium-high heat, sauté onion and carrot for 7-8 minutes. (I use 3 Tbsp. water/broth for no-oil sauté method, adding more as needed.) When onion is soft, add potato, garlic, and Italian seasoning. Stir and sauté 2-3 minutes.: You will hear a gentle sizzle as the vegetables hit the pot, and the smell of caramelizing onion and carrot becomes sweet and savory. Using a no oil method with small amounts of water or broth keeps the pan from drying out while still allowing the edges to soften and pick up color. Stir frequently so the pieces cook evenly and do not stick. If you rush the heat too high, the vegetables can brown unevenly or burn, imparting bitter notes. Add the potato , garlic , and Italian seasoning after the initial sauté; the garlic will become fragrant during the next few minutes without turning bitter.
Cook soup: Add broth, garbanzo beans (rinsed and drained), peas, green beans, and corn. Bring to a light boil. Then cover, reduce heat, and simmer for 20 minutes.: When you add the vegetable broth and canned garbanzo beans , the pot will release a warm, savory steam and the liquid will take on a deeper color. Bring the mixture to a gentle boil, then reduce to a simmer; you want soft, yielding vegetables but not a frantic rolling boil. As it simmers, the potato releases starch which helps the body of the chowder, and the garbanzo beans plump and contribute heartiness. Simmer time is critical: too short and potatoes remain firm, too long and vegetables can disintegrate. Keep the lid partially on to control evaporation, and skim any foam or scum that may collect to keep flavors clean.
Make cashew cream: Meanwhile, place all cashew cream ingredients in a small high-speed blender. (I use a NutriBullet which works great.) Blend for 20-30 seconds until smooth.: While the soup simmers, the blender will hum and the air will fill with a light nutty scent as you turn raw soaked cashews , water, nutritional yeast , tamari , cornstarch, and optional white miso into an opulent cream. Aim for a silky texture about the consistency of heavy cream, with no gritty bits; a high speed blender will produce the best result. If the cream seems gritty, it usually means the cashews were not soaked enough or the blender needs more time or liquid. A smooth cashew cream is essential because it emulsifies with the broth and gives the chowder that satisfying luxurious mouthfeel.
Combine: After the soup simmers for 20 minutes, add cashew cream. Heat for about 5 minutes, stirring often, until thickened. (The soup will continue to thicken as it sits.) Serve warm with salt & pepper to taste or chopped chives or parsley if desired.: As you stir the cashew cream into the simmering pot, you will notice the broth become creamier and take on a slightly glossy sheen. Gentle, frequent stirring helps the cashew cream integrate smoothly and prevents scorching on the bottom. Allow about five minutes of gentle heating to activate the cornstarch and coax the chowder to a pleasing thickness; it will continue to become richer as it rests. A typical error here is turning the heat too high which can separate the cream or reduce the broth too quickly. Taste now and adjust seasoning with a little more tamari or salt if needed, and finish with chopped chives or fresh parsley for freshness.