Add the avocado oil to a large thick-bottomed pot or large skillet (I use a Dutch oven) and heat to medium-high heat on the stovetop. Sauté the onion for 2 to 3 minutes.
Transfer the chopped potatoes to the pot, stir well, then cover. Cook for 2 to 3 minutes while you’re chopping the other vegetables.
Scoot the onion and potato off to the side and add the ground beef. Brown the beef for 2 minutes before using a spatula to chop it into smaller bites.
Stir in the red bell pepper, jalapeno, and garlic and cook for 2 minutes.
Add in the chopped tomatoes, green peas, beef broth, sea salt, dried oregano, and ground cumin. Bring the picadillo to a full boil and cook, stirring occasionally, until the potatoes are cooked through and the sauce has thickened, about 8 to 10 minutes.
Serve picadillo with steamed white rice, brown rice or Homemade Spanish Rice, flour tortillas, black beans, avocado, sour cream, and fresh cilantro, or use picadillo for tacos or empanadas (or other pastry).