Cook the onions an garlic in oil over medium heat until soft. Add the smoked turkey pieces.
Add melon seeds to a blender and pour in 1 cup water. Puree until the mixture looks like milk with little flecks of white in it. When you break down the seeds this much, it allows the water to soften them and they expand and thicken the stew.
Pour egusi sauce over the turkey. Take remaining 1/2 cup of water and swirl it around the blender, getting all the bits out. Pour that into the stew as well.
Add tomato puree. Simmer 30 minutes and serve hot with white rice.