Heat a large skillet over medium-high heat. Add oil to pan; swirl.
Add potato, oregano, and ½ teaspoon salt; cook 3 minutes, stirring occasionally.
Add cumin, cinnamon, red pepper, and garlic; cook 1 minute.
Add ½ cup water; cover, reduce heat, and cook 5 minutes.
Uncover; cook 2 minutes.
Remove pan from heat.In a separate saucepan, add onion and peppers. Saute 5-10 minutes on medium heat until cooked through.
Add to potato mixture and cook another 5 minutes, stirring to combine.
Add remaining salt, black beans, adobo sauce and brown sugar.
When serving, top potato mixture with 1 tbsp cheese, 1 tbsp pumpkin seeds and diced tomato.