Step 1
In a skillet over medium heat, heat oil. Add chicken and season with salt, pepper, and oregano. Cook until golden and no longer pink, 8 minutes per side. Remove from skillet and set aside.
Step 2
In the same skillet over medium heat, melt butter. Stir in garlic and cook until fragrant, about 1 minute. Add cherry tomatoes and season with salt and pepper. Cook until tomatoes are beginning to burst then add spinach and cook until spinach is beginning to wilt.
Step 3
Stir in heavy cream and parmesan and bring mixture to a simmer. Reduce heat to low and simmer until sauce is slightly reduced, about 3 minutes. Return chicken to skillet and cook until heated through, 5 to 7 minutes.
Step 4
Serve with lemon wedges.