Place a large skillet over medium-high heat with oil. Add salt and pepper to shrimp. Add shrimp to skillet once oil is shimmering. Sear shrimp on both sides. About 2 minutes each side. Remove from skillet and set aside.

Using the same skillet, set heat to medium and add butter. Add garlic once the butter has melted and cook until fragrant, about 1 minute. Add tomatoes, season with salt and pepper to taste. Once tomatoes start to burst add and cook spinach until it begins to wilt.

Stir heavy cream, parmesan, and basil until it starts to simmer. Reduce heat to low and simmer until slightly reduced.

Return shrimp to skillet and cook until the shrimp is heated through. Take off heat and garnish with extra basil and lemon slices.