While beef is the standard choice for this family dining classic, ground turkey works perfectly well for a lighter substitute. Be sure to complete the experience with a French red; Merlot or Cabernet Sauvignon always stand up to the hearty flavour of the meat loaf.
Preheat oven to 350 F. Oil loaf pan with coconut oil.
Heat olive oil in a skillet over medium-high heat; cook and stir zucchini, mushrooms and onion in the hot oil until onion is transparent, around 5 minutes.
Add arugula, spinach and garlic and cook for 2 additional minutes. Remove from heat and allow to cool.
Combine ground beef (or turkey), steel cut oats, eggs, barbecue sauce, salt, pepper and cooked vegetable mixture in a large bowl; mix well using your hands.
Press meat mixture into the prepared loaf pan.
Bake in the preheated oven until 160 F in the center, approximately 35 to 40 minutes.