Grilled Chicken Avocado Sandwich

• boneless skinless chicken breast · boneless and skinless1 piece
• red onion · thinly sliced1 medium onion
• romaine lettuce · washed and dried7 leafs
• avocado · peeled and pitted1 avocado
• unsalted butter · unsalted1 1/2 tbsp
• plain greek yogurt · plain, whole milk1/3 cup
• salt3/4 tsp
• black pepper · ground3/4 tsp
• garlic powder3/4 tsp
• roma tomato · sliced1 medium tomato
• lemon juice · fresh3 wedges
• sourdough bread · 4 slices1 slice

Steps

1. 1Mash the avocado with the Greek yogurt, lemon juice, garlic powder, half of the salt, and half of the black pepper until mostly smooth.
2. 2Pat the chicken breast dry, then season both sides with the remaining salt and black pepper.
3. 3Melt the butter in a skillet over medium heat. Add the chicken and cook until browned and cooked through, turning once. Let it rest for 3 minutes, then slice thinly.
4. 4Place the sourdough bread in the same skillet and toast both sides until lightly crisp.
5. 5Spread the avocado yogurt mixture on the toasted bread. Layer with lettuce, tomato, red onion, and sliced chicken. Close the sandwiches and cut in half.