Easy Stovetop Shrimp Boil

Bring 4 quarts water, onions, seasoning, halved lemon, garlic, and salt to a boil in a large stockpot. Add potatoes, sausage, and artichoke and boil until potatoes are just tender, 18 to 20 minutes. Add shrimp and corn and cook until shrimp are opaque, about 3 minutes. Drain and serve on a large platter with lemon wedges.