Veggie Frittata Muffins

Name: Veggie Frittata Muffins
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: European, Italian, Mediterranean
Ingredients: Cooking spray or olive oil (for the pan); 8 large eggs; ⅓ cup unsweetened almond milk; 1 garlic clove (minced); ¼ teaspoon Dijon mustard (I like Sir Kensington's); 2 to 4 tablespoons chopped fresh dill; ½ teaspoon sea salt; Freshly ground black pepper; 2 small kale leaves (finely shredded); 1 cup halved cherry tomatoes; ¼ cup chopped scallions; ⅓ cup crumbled feta cheese