Cook the pasta in plenty of salted water for 8-10 minutes until al dente, then drain. Mix the eggs, cream cheese and milk together and season well with salt and pepper.
Spread garlic butter on a large baking dish. Place the bacon slices on the edge of the dish, leaving about 5 cm protruding.
Pour macaroni and peas into the mold and pour the egg milk over it. Fold the protruding strips of bacon over it. Sprinkle the cheese over the casserole. Spread 2 teaspoons of garlic butter on top.
Bake in a preheated oven at 200 ° C, fan oven 175 ° C, gas mark 3, for 30-40 minutes.