Melt ghee over medium-low heat.
Add your chopped onions and garlic, saute a few minutes.
Add diced peppers and Italian seasoning. Cook until the onions are clear and soft.
Increase heat to medium-high and add tomato paste and vinegar, whisk until well combined.
Slowly add broth, whisking until combined.
Add the tomatoes and let simmer for up to 2 hours.
Add salt and pepper and garnish with fresh basil.