Even though they're frozen, quickly sear the meatballs in a hot skillet for 2-3 minutes per side before adding to the slow cooker to develop a flavorful crust and prevent them from becoming mushy.

Place harder vegetables like carrots and celery on the bottom and potatoes in the middle, then top with softer items like peas to ensure even cooking and prevent the delicate veggies from disintegrating.

Mix tomato paste with a bit of beef broth and cook it in a separate pan for 1-2 minutes before adding to the slow cooker to intensify its umami depth and eliminate any raw, acidic taste.

Stir in the frozen peas during the last 15-20 minutes of cooking so they retain their bright color, fresh texture, and vibrant flavor instead of becoming dull and mushy.

Reserve and sprinkle fresh chopped parsley just before serving to add a bright, herbaceous contrast that cuts through the richness and elevates the dish's presentation without losing its delicate flavor.