1-First, gather and prepare all ingredients. Chop the onion finely and measure everything out to keep things organized. In a large bowl, combine the ground beef, ground pork, bread crumbs, minced onion, milk, eggs, Worcestershire sauce, salt, and pepper, mixing gently to avoid overworking the meat.

2-Next, shape the mixture into 1-inch meatballs, aiming for about 48 pieces for even cooking. Brown the meatballs by pan-frying or baking at 400 degrees Fahrenheit until they reach an internal temperature of 165 degrees Fahrenheit, which helps lock in flavor and texture.

3-Then, place the meatballs in the crockpot and add the chili sauce and grape jelly, stirring gently to coat them evenly. Cover and cook on low for 4 to 6 hours or on high for 2 to 3 hours until everything is hot and bubbly. Alternatively, simmer the meatballs with the sauces in a saucepan for about 10 minutes if you need a quicker option.