Grilled Tuna Kebabs - Dump and Go Dinner

Ingredients

• 1 ½ pounds Tuna Steaks
• 2 ½ cups chunk Onion
• 2 ½ cups chunk Bell Pepper, Green
• 2 ½ cups chunk Bell Pepper, Red
• 10 medium Mushrooms
• ½ cups Olive Oil
• 4 tablespoons Lemon Juice
• 2 tablespoons mince Onion
• 2 teaspoons mince Garlic, Cloves
• 1 tablespoon chop Rosemary, Fresh
• 1 teaspoon Salt
• ½ teaspoons Black Pepper