Preheat the oven to 350º F (175º C)
Pull off the outer layers of garlic skin and cut the pointy tops off the heads so the cloves are partially exposed. Put the garlic in a large aluminum foil packet, drizzle liberally with approximately 1 tablespoon olive oil, then close the aluminum foil packet.
Roast the garlic for 45 minutes.
While the garlic is roasting, put the red curry paste, peanut butter, stevia, chili powder, cayenne pepper, and sesame oil in a food processor.
When the roasting is done and the garlic is cool enough to touch, add the garlic cloves to the food processor by squeezing them individually at the bottom to push them out of the skin. Process until well combined.