High Protein Grilled Chicken Salad
Ingredients 1 small red onion 5 tablespoons red-wine vinegar, divided 2 medium cloves garlic, grated 1 teaspoon Dijon mustard 1 ½ teaspoons salt, divided ⅔ cup grapeseed oil, plus more for grill grates ½ teaspoon paprika 1 medium zucchini, sliced lengthwise into 1/2-inch-thick planks 1 small yellow bell pepper, cut into 2-inch-thick strips 2 large romaine lettuce hearts, halved lengthwise 3 (8 ounce) boneless, skinless chicken breasts 1 (5 ounce) package fresh baby spinach 2 small tomatoes, cut into 1-inch…