From the cookbook From Harlem to Heaven, by JJ Johnson and Alexander Smalls.
"In cooking school, we were taught the five French “mother sauces” as defined by French cuisine. The foundational sauce to the Afro-Asian flavor profile is what we call 'the Mother Africa Sauce,' a riff on West African peanut sauce.
You can pour it over a bowl of rice. You can dice up a sweet potato and mix it in as a stew. It tastes delicious with the meat of the chicken thigh crumbled into the mix. This sauce will keep for five days in the fridge and you can eat it every day, in a different way. It’s an easy back-pocket sauce that you can’t mess up. It’s both comfort food and comforting to cook. So give it a try." —JJ Johnson
Heat the oil in a 4-quart pot over medium heat, add the cumin, and fry for 1 minute, stirring constantly. The cumin will become very aromatic and a few shades darker.
Add the onion, carrots, tomato, celery, garlic, bay leaf, cilantro, chile, salt, and lemon juice, stirring to coat the vegetables in the toasted cumin oil. Sauté until the vegetables soften, about 5 minutes.
Stir in the tomato paste and cook for 2 minutes. Once the tomato paste is incorporated, add the peanut butter and cook until the oil separates from the peanut butter, about 5 minutes.
Add the stock and stir, making sure to bring up all of the tomato paste and peanut butter from the bottom of the pot so it is well blended. Increase the heat to medium-high to bring the sauce to a simmer. Cook, stirring, for 45 minutes.
Remove bay leaf. Using an immersion blender, puree the sauce in the pot until smooth. Season with salt to taste.