Salmon Hash

Name: Salmon Hash
Ingredients: 1/4 cup nonfat plain Greek yogurt; 1 tablespoon dijon mustard; 2 tablespoons chopped fresh dill; 2 tablespoons extra-virgin olive oil; 3 cups frozen cubed hash browns; Kosher salt and freshly ground pepper; 1 red onion, thinly sliced; 2 bell peppers (red and/or green), chopped; 3/4 pound skinless salmon fillet, cut into 1/2-inch pieces; 8 cups baby arugula; Lemon wedges, for serving (optional)