Tias Shrimp and Grits

Name: Tia's Shrimp and Grits
Ingredients: 4 slices bacon; 1 pound large shrimp, peeled and deveined; Kosher salt and freshly ground black pepper; 2 tablespoons unsalted butter; 2 stalks celery, finely chopped; 1 large clove garlic, minced; 1 small onion, finely chopped; 1 small green bell pepper, finely chopped; One 26.45-ounce box strained tomatoes, such as Pomi; 1/2 teaspoon seafood seasoning, such as Old Bay Seasoning; 2 1/2 cups milk; Kosher salt; 1 cup grits; 1/2 cup shredded Cheddar; 3 tablespoons unsalted butter; Freshly ground black pepper; 3 green onions, chopped