1, Heat nonstick skillet over medium-high heat, and coat with cooking spray. Add onion, and cook 5 minutes, or until softened and starting to brown. Stir in cumin, turmeric, 1/2 tsp. salt, and pepper. Add lentils and 2 1/2 cups water. Bring to a boil, cover, and reduce heat to medium-low. Simmer 40 minutes, or until lentils are cooked but still hold their shape. There will be 1 to 2 Tbs. liquid left in pan.
2. Meanwhile, combine yogurt, cucumber, mint, and remaining 1/8 tsp. salt in bowl.
3. Fill tortillas with spinach, bean sprouts, and lentil mixture. Drizzle with yogurt mixture or serve on side.