☀️
One-Pot
Solar Box Lentil Soup
Cook a full meal using only sunlight — no fuel, no fire, no noise.
Medium👥 Serves 4⏱ Prep: 10 min🔥 Cook: 2–3 hours (solar)⚡ 310 kcal/serving📦 Shelf: 25+ years (dry lentils)
Equipment
- ▸Solar box cooker or dark pot + reflective material
- ▸Dark-colored pot with lid
Ingredients
- 1 cupred or green lentils
- 3 cupswater
- 1 tspsalt
- 1 tspcumin
- 1 tspturmeric (optional)
- 2 clovesgarlic or ½ tsp garlic powder
Shelf-StableSolarNo-FuelHigh-ProteinBeginner
Instructions
1
Rinse lentils in water.
2
Combine all ingredients in a dark pot. Cover with lid.
3
Place in solar cooker or position in direct sunlight with reflectors focused on pot.
4
Cook 2–3 hours in full sun — pot should reach 200°F+ internally.
5
Check after 2 hours. Lentils should be fully soft and soup thickened.
6
Stir and serve. Season additionally if available.
Field Tips
- Red lentils cook fastest and don't require soaking — ideal for solar cooking.
- A black pot inside a clear plastic bag in direct sun reaches 180–200°F — enough to cook lentils.
- Solar cooking works best between 10am–2pm in direct sun.
- No stirring needed — the slow even heat self-regulates.
Variations
- ▸Add canned tomatoes for a heartier dal-style soup
- ▸Stir in olive oil at end for added calories
- ▸Use split peas instead of lentils — same cook time
Storage Notes
Dry lentils in sealed Mylar with oxygen absorbers last 25+ years. Cooked soup keeps 2–3 days in cool conditions.