Prepare the Vegetables: Slice the avocados, remove the pit, and scoop the flesh into a large bowl. Dice the cherry tomatoes, cucumber, and bell peppers. Thinly slice the onion.
Combine the Veggies: Add the diced tomatoes, cucumber, bell peppers, and onions into the bowl with the avocado. Stir gently to mix.
Make the Dressing: In a small bowl, whisk together sunflower oil, milk, mustard, minced garlic, honey, salt, and black pepper. Whisk until smooth and well combined.
Toss and Serve: Pour the dressing over the vegetables and toss gently to combine. Ensure all the ingredients are coated with the dressing.
Serve: Serve immediately or refrigerate for 30 minutes to let the flavors meld together. This salad can be served as a light meal or side dish.