Heat a large, deep sauté pan over medium-high heat and spray with cooking spray. Add ground turkey and begin breaking up with a wooden spoon.
While turkey is browning, dice up the onion, garlic and zucchini then toss into the pan. Stir occasionally while meat continues to brown and veggies begin to soften.
Add Worcestershire, steak seasoning and smoked paprika to the pan and continue cooking until most of the liquid evaporates, about 7-9 minutes.
Add tomato sauce and barbecue sauce to the pan and bring to a boil. Stir then reduce heat to low to simmer. Stir in corn then continue to simmer on low for 10 minutes.
Check for seasoning before serving in iceberg lettuce cups. Garnish with red onion if you wish.