½
small pink onion, thinly sliced
1
lemon, halved
¾
tsp. Diamond Crystal or ½ tsp. Morton kosher salt, plus extra
4
substantial eggs, room temperature
1
huge egg white, space temperature
2
garlic cloves, finely grated
1
(packed) cup baby spinach
⅔
cup entire milk, place temperature
1
cup tender herb leaves (these as dill, cilantro, basil, and/or parsley), plus further for serving
⅔
cup (83 g) all-objective flour
2
Tbsp. cornstarch
Freshly floor black pepper
2
Tbsp. unsalted butter, reduce into components
4
oz. smoked salmon
