Cook the quinoa: Rinse quinoa thoroughly, then cook it in water for about 15 minutes until fluffy.
Prepare the lentils: Boil lentils until soft but not mushy, usually 20–25 minutes depending on type.
Chop vegetables: While grains cook, wash and chop spinach, tomatoes, cucumber, and carrots.
Assemble the bowl: In a large bowl, combine quinoa, lentils, and vegetables.
Add healthy fats: Top with avocado slices and drizzle olive oil and lemon juice.
Season and mix: Add salt, pepper, cumin, and chili flakes. Mix well before serving.