Salmon Burgers with Quick-Pickled Cucumber Salad

Name: Salmon Burgers with Quick-Pickled Cucumber Salad
Prep time: 20 min
Cook time: 16 min
Total time: 36 min
Cuisine: American
Ingredients: 1 seedless cucumber, very thinly sliced; 2 shallots, thinly sliced; 1/4 cup white or rice wine vinegar; 1 small sprig fresh dill, minced; 1 tsp. sugar; 1/4 tsp. sea salt; fresh cracked pepper, to taste; 1 pound wild-caught salmon, thawed if frozen, finely chopped; 1/2 cup bread gluten-free bread crumbs; 1 egg, lightly beaten; 1 large shallot, minced; 1 Tablespoon fresh lemon juice; 1 teaspoon Dijon mustard; 1/2 teaspoon salt; 1/8 teaspoon fresh ground black pepper; 1/2 cup plain Greek yogurt; Zest of 1 lemon; 1 Tablespoon capers, rinsed and drained, finely chopped; 1 Tablespoon finely minced dill; salt and black pepper, to taste; 4 gluten-free or regular buns; 1 cup baby spinach