Romaine Tomato Salad | Grilled with Avocado

Ingredients

• 4 hearts Romaine lettuce, halved lengthwise
• 4 large red tomatoes, halved
• 4 medium yellow tomatoes, halved
• 2 small red onions, halved
• 2 Tbsp olive oil
• 3 Tbsp balsamic vinegar
• 1/4 tsp salt
• Black pepper to taste
• 1 avocado, pitted, peeled and chopped
• 1 Tbsp sunflower seeds
• Chopped fresh basil, for garnish