Peel and chop the avocados and place them in a bowl. Mash until creamy using a fork.: When you scoop the ripe avocado into the bowl you should smell a faint, nutty aroma and feel a buttery texture as you press it; mash until creamy so the spread is smooth but still has slight texture. I love the gentle green scent that rises as the avocado breaks down. Make sure not to overwork it into a paste, or it can become too thin. If your avocado seems firm, let it sit a few minutes at room temperature to soften, otherwise the mix can be lumpy and uneven.
Peel and chop the hard boiled eggs and add them to the bowl with the mashed avocado along with the rest of the ingredients. Stir everything together well until the mixture is well-combined and creamy.: As you mash with a fork you will hear soft scraping and see a glossy, pale green mixture form; this gloss indicates the right creaminess that helps bind the salad. The reason we use a fork is to keep little pockets of texture rather than creating a puree, which helps the final sandwich feel substantial. A common mistake is overmashing, which can make the spread too loose and cause sogginess on the bread, so stop once it looks spreadable and slightly lumpy.
Taste the egg salad for flavor and add more sea salt or lemon juice to taste.: When you chop the fully cooked eggs you'll notice the bright yellow yolks and the firm whites, and when combined they add a contrasting texture to the creamy avocado . Add the minced garlic , the cider vinegar or lemon juice , the chopped basil , leaves of thyme , and chopped sage now so the acid can mingle with the herbs and release their aromas. Stir until everything looks uniformly speckled with green and the mixture glistens slightly. One trap is chopping the eggs too finely, which can create a pasty mouthfeel; aim for small chunks that lend bite and structure.
Prepare sandwiches by adding baby spinach and desired amount of egg salad to toasted bread. Serve and enjoy.: As you stir you will see the ingredients coalesce, the herbs distribute, and the mixture take on a cohesive sheen, which means it is well emulsified; this uniformity ensures each bite has balanced flavor. I often scrape the sides of the bowl and fold gently to preserve texture and avoid overworking the salad. The why here is that even mixing prevents pockets of acid or salt. Watch out for overseasoning, it's easier to add more salt than fix too much, so taste before final adjustments.
Taste the egg salad for flavor and add more sea salt or lemon juice to taste: Take a small taste on a spoon or piece of toast to assess salt and brightness; you should detect a gentle balance between the buttery avocado , savory eggs , and zesty acid. Add tiny increments of salt or another splash of lemon juice until the flavors pop, because small changes have a big effect. If the salad seems flat, acid will usually rescue it, while if it feels too sharp, a little more avocado can mellow the mix. Avoid dumping in large amounts of seasoning at once, as that is the most common error.
Prepare sandwiches by adding baby spinach and desired amount of egg salad to toasted bread: Lay out toasted slices of gluten free bread and arrange a layer of crisp baby spinach so the leaves protect the toast from becoming soggy. Spoon a generous portion of the salad onto one slice and spread gently, noticing the contrast between the creamy filling and the crunchy toast edges; the smell of toasted grain complements the herbs. Assemble the sandwich and press lightly to help the fillings meld. A typical pitfall is using bread that is not toasted enough, which allows moisture to soak through, so always toast until golden and slightly crisp.
Serve and enjoy: Serve immediately so the toast stays crisp and the baby spinach remains fresh; you will hear a slight crunch as you bite and taste a medley of creamy, herbaceous, and tangy elements. This is the moment when the textures and flavors come together, and the aroma of herbs will be most pronounced. If you leave the sandwiches too long they can become soggy, so plan assembly close to eating for best results.