I make shish kabobs with pork. This is the marinade I have been using for 52 years! 1/2 c veg oil, 1 12 oz bottle of beer, 1 teas dry mustard, 1 teas oregano, 1/2 teas salt, 1/2 teas black pepper, 2 Tables minced onion, 1 bay leaf.
Mix all ingredients together. Add cubes of meat, marinade meat over-night. Arrange meat, vegetables, & fruit on skewers. Close to end of cooking, baste the shish kabobs with remainder of marinade. When I make mine, using pork, I also add chopped onion, chopped green pepper, whole mushrooms, tomatoes, and pineapple chunks.
Also: Over the years, I have improved on my kabob making. I found these on amazon several years ago and they eliminate the skewers, altogether. Just load the oblong baskets, secure them shut , and put on the grill.