Rachael Ray's Spanakopita Burgers

extra virgin olive oil, plus some for drizzling

butter

garlic cloves, chopped

red onion, chopped

box frozen spinach, defrosted

fresh oregano (dried will work)

feta, crumbles

lbs ground chicken or 1 1/3 lbs ground turkey breast, 1 package

grill seasoning (recommended, Montreal Steak Seasoning by McCormick)