Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.

Season chicken with salt, pepper, and minced garlic. Sear in a skillet over medium-high heat for about 6-7 minutes per side until cooked through. Let rest before slicing.

In a small bowl, whisk together soy sauce and lemon juice.

On one slice of bread, layer sliced chicken, mashed avocado (seasoned with salt), and cheddar cheese. Top with another slice of bread.

Lightly spray both sides with olive oil or butter. Place on the baking sheet and bake for 10-12 minutes until golden brown and cheesy.

Slice in half and drizzle with any leftover sauce before serving.