Avocado Cherry Tomato Salad

• 1 avocado, diced
• 1 cup cherry tomatoes, halved
• 4 cups salad greens of your choice; I used dandelion greens
• ¼ cup thinly sliced red onion

For the salad dressing:

• ½ cup olive oil
• Juice of 1 lemon
• Salt and pepper to taste
• ½ tsp red pepper flakes
• ½ tsp Dijon mustard