In a large non-stick skillet, heat oil over medium-high heat. Add onions, garlic, mushrooms, red pepper and jalapeño peppers and cook, stirring occasionally until vegetables are tender, about 10 minutes. Season with salt and pepper.
Let cool slightly, then stir in Hellmann's® Real Mayonnaise. Spoon half of the filling on one tortilla, spreading it almost to the edges.
Sprinkle with half of the cheese and cilantro, then cover with a second tortilla. Repeat with remaining tortillas and filling.
In same skillet, over medium-high heat, cook one of the filled tortillas for 2 minutes on each side or until lightly golden and cheese has melted. Repeat with remaining filled tortillas.