In large skillet, brown ground beef with chopped onion and crushed garlic cloves. Season with pepper. Once fully cooked, drain and rinse ground beef. Do not return beef to the skillet. Yet.
In same skillet, add margarine or butter. Once melted, whisk in flour to form a paste. Quickly whisk in milk until no clumps remain. Cook for 3-4 minutes over medium heat, until sauce starts to bubble and thicken.
Once sauce starts to thicken, add 1 cup of water and 2 cups of pasta shells. Stir through.
Add 1 lb. of meat and mix together. Cover and cook over medium heat for 12-15 minutes, or until pasta shells have cooked through.
Stir often. Season with salt and pepper to taste. Remove from heat. Sauce will thicken slightly after removing from heat.
Prepare frozen peas as indicated on package instructions.
Serve "Hamburger Helper" Pasta with Peas.