Grilled Portabella Mushrooms – Stuffed

4 (5-inch) portabella mushroom caps 2/3 cup chopped Roma tomato ¼ cup shredded part-skim mozzarella cheese 1 teaspoon olive oil, divided 1 teaspoon sesame oil ½ teaspoon finely chopped fresh rosemary ½ teaspoon finely chopped fresh basil 1/8 teaspoon coarsely ground black pepper 1 garlic clove, crushed and chopped fine 2 tablespoons fresh lemon juice…