Uncle Pooh’s Shrimp, Sausage, And Grits

Ingredients

• 3 cups whole milk
• 3 cups heavy cream
• 1 cup white corn grit
• 2 tsp salt, divided
• 1 tsp black pepper, divided
• 3 tbsp unsalted butter
• ½ cup shredded cheddar cheese
• 2 tbsp vegetable oil
• 1 medium white onion, minced
• 1 yellow bell pepper, diced
• 1 medium red bell pepper, diced
• 2 cloves garlic, minced
• 1 lb andouille sausage, sliced
• 1 cup chicken stock
• 1 lb large raw shrimp, peeled and deveined
• 1 pinch cayenne pepper, plus more to taste
• scallion, sliced, for serving