Form 6-8 patties from ground beef
Preheat a large skillet, and sear patties over high heat for about 3 minutes on each side until richly browned
(alternatively use leftover grilled burgers)
Set the patties aside, drain the fat
In the same skillet, saute onions, celery and red bell pepper with 1 Tbsp of oil over high heat, until golden brown, about 5-8 minutes
Crumble beef patties into 1/4 to 3/8 inch pieces using a fork
Place all of the ingredients into a large pot, bring to simmer over low heat.
Cook for about 1.5 to 2 hours, stirring every 15 minutes
Garnish with greens and shredded cheddar cheese