Black Bean Chili Over Sweet Potatoes

• 4 sweet potatoes
• 4 lime (wedges)
• 2 crooknecksquash (diced yellow)
• 1 non-fat yogurt (plain)
• 270 gr bell pepper (diced red)
• 180 gr onions (chopped)
• 16 ml olive oil
• 9 gr seeded jalapeno chili (minced)
• 8 gr garlic (minced)
• 8 gr chili powder