In a bowl, combine the mayonnaise, lemon juice, red wine vinegar, and olive oil; season with salt and pepper to taste.
½ cup homemade mayonnaise, 2 tbsp. fresh lemon juice, 2 tbsp. red wine vinegar, ¼ cup extra virgin olive oil, Sea salt and freshly ground black pepper
Whisk until everything is well-emulsified.
Place the cauliflower, broccoli, oranges, onion, and bacon in a large salad bowl.
1 broccoli head, 1 cauliflower head, 2 oranges, ½ red onion, 6 to 8 bacon slices
Pour the dressing over and gently toss everything until well combined.
Refrigerate covered for 30 minutes or more before serving.