In a large skillet over medium heat, cook the bacon until crisp. Remove with a slotted spoon to a paper towel lined plate. Drain all but 2 Tbsp. of the bacon grease in the skillet.
Add the onion to the hot bacon grease and cook until softened, about 5-8 minutes. Add the garlic and cook for an additional minute. Pour in the chicken broth and the milk, and bring to a boil. Once the liquid is boiling, add the dry pasta and reduce the heat to medium-low. Cover the skillet and allow the pasta to cook until al dente, about 15 minutes.
Once the pasta is cooked, add the peas and continue to cook until they have defrosted. Stir in the sour cream and the reserved bacon. Taste and season to taste with salt and pepper.
