Add oil and butter in a large skillet over medium high heat.
Add red onion, peppers, celery, corn and Swiss chard to skillet, Sauté veggies for 5 minutes to soften. Season with salt and pepper and paprika. Add the garlic and sauté for 1 minute or just until soft and golden.
Reduce to medium heat. If pan looks dry, add a 1 to 2 tbsp water. Cook until corn softens and veggies are tender, about 3 to 5 minutes.