Shrimp Pita

Ingredients

• ¾ cup olive oil
• ½ cup red wine vinegar
• 2 medium onions, chopped, divided
• 2 cloves garlic, minced, divided
• 2 teaspoons Italian seasoning, divided
• 1 pound medium shrimp, peeled, deveined
• 2 medium red or green bell peppers, julienned
• 4 cups fresh spinach leaves, stems removed and torn
• 3 cups cooked brown rice
• 1 teaspoon salt
• ½ teaspoon ground black pepper
• 3 pieces pita bread, each cut in half