Lisa's 1-Skillet Chicken

Ingredients (9)

• ✓ 1 tablespoon olive oil
• + 2 boneless chicken breast halves, sliced into strips add to pantry
• + salt and ground black pepper to taste add to pantry
• + salt and ground black pepper to taste add to pantry
• ✓ 2 tablespoons butter
• + 1 pint mushrooms, sliced add to pantry
• ✓ 2 cloves garlic, minced
• + 1 tomato, diced add to pantry
• + 1 ½ cups baby spinach add to pantry