Heat the olive oil in a large Dutch oven over medium-high heat. Add the pork cubes and cook until browned on all sides, about 5 minutes total.
Add the diced onion and minced garlic to the pot. Stir and cook until the onion softens, about 3 minutes.
Pour in the diced tomatoes and chicken broth. Add the dried thyme, salt, and black pepper. Stir to combine.
Bring the mixture to a simmer. Reduce the heat to low, cover the pot, and cook for 45 minutes until the pork is tender.
Stir in the frozen peas and corn. Cook uncovered for 5 more minutes until the vegetables are heated through.