Ingredients:
- 1 head red leaf lettuce
- 1 red bell pepper, chopped
- 1 stalk green onion, thinly sliced
- 3 tablespoons extra-virgin olive oil
- 1 tablespoon red wine vinegar
- 1 tablespoon balsamic vinegar
- 1 tablespoon lemon juice
- 0.5 teaspoon salt, or to taste
- 0.25 teaspoon Dijon mustard, or more to taste
- freshly ground black pepper to taste
