Bring a large pot of water to a boil with the onion and chicken breasts. Boil until the chicken is fully cooked, remove the chicken from the water, and save the broth for the recipe.
Take the chicken and shred it with your hands.
In another medium pot over medium heat, cook the tomatoes in water for 10 minutes.
While the tomatoes are cooking, grind the pumpkin seed with a molcajete or in a food processor.
In a blender, mix the tomatoes, lettuce, epazote, and chiles.
In a large skillet, heat the butter over low heat and cook the tomato sauce for 15 minutes.
Add the pumpkin seed and 1/4 cup of chicken broth to the skillet and let it boil for 10 more minutes.
Add the epazote and the chicken and continue cooking for 45 minutes. Remove from heat, take out the epazote, and season with salt to taste. Serve.
Nutritional Information
* * Information per 100g serving, percentage of daily values based on a 2,000 calorie diet.
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