Cut the kielbasa sausage in half lengthwise, then chop into ½ inch pieces.
Slice the yellow squash into similar sized pieces as the sausage. Repeat with the tomatoes.
Seed and chop the bell pepper. Peel and chop the onion.
In a cast iron skillet, heat the oil over medium-high heat. Add the sausage and garlic. Cook and stir frequently until the sausage until browned.
Move the sausage to the side of the pan. Add the squash, peppers, and onions. Cook and stir until browned. Stir the vegetables and sausage together. Layer the tomatoes on top.
Sprinkle with seasoning, salt, pepper and cayenne. Let it sit for a few minutes until the tomatoes begin to form a sauce. Stir everything together. Reduce heat and simmer until the vegetables are tender.
Add beer as needed to keep the vegetables from sticking.