Step 1Place the romaine, arugula, red onion, salami, provolone, tomato and basil in a large bowl. Cover with a lightly dampened paper towel; keep refrigerated until ready to use, up to 4 hours.
Step 2Combine the olive oil, the balsamic and red wine vinegars, the garlic, salt and pepper to taste in a small dish.
Step 3To serve, pour the dressing over the salad. Toss several times until coated. Taste; adjust the seasoning.