Making the Beet, Spinach, and Avocado Salad with Toasted Sesame Seeds is straightforward. Just follow these simple steps:

1. Preheat Oven: Begin by preheating your oven to 400°F (200°C) if you are roasting your beets.

2. Prepare Beets: Wash the beets thoroughly and wrap each one in aluminum foil. Place them on a baking sheet and roast in the oven for about 30-40 minutes, or until fork-tender. Allow the beets to cool, then peel and dice them.

3. Toast Sesame Seeds: While the beets are roasting, heat a small skillet over medium heat. Add the sesame seeds and toast them for about 3-5 minutes, stirring frequently until they are golden brown. Remove from heat and set aside.

4. Wash Spinach: Rinse the fresh spinach leaves under cold water. Pat dry or use a salad spinner to remove excess water.

5. Slice Avocado: Carefully cut the avocado in half, remove the pit, and scoop the flesh out with a spoon. Cut the avocado into bite-sized pieces.

6. Combine Ingredients: In a large salad bowl, add the spinach leaves, diced roasted beets, avocado, and red onion.

7. Make Dressing: In a small bowl, whisk together the lemon juice, olive oil, salt, and pepper to taste.

8. Dress Salad: Pour the dressing over the salad mixture. Gently toss everything to combine, ensuring all ingredients are coated with the dressing.

9. Add Feta and Sesame Seeds: If using feta cheese, sprinkle it over the salad. Finally, garnish with the toasted sesame seeds for added crunch.

10. Serve Immediately: Your salad is ready to be enjoyed!

These easy steps will create a beautifully vibrant salad that is not only healthy but also bursting with flavor.