Add onions, celery, and carrots to a skillet with heated butter and olive oil. Be careful not to brown the onions as you cook them for a few minutes until they soften. Sauté the garlic, broccoli, corn, mushrooms, and beans for two to three minutes. Stir in the oregano and thyme, then stir in the flour.
Add the flour, thyme, and oregano, and cook for one and a half minutes, stirring the mixture. Slowly pour in the whole milk, stirring constantly. After bringing this to a boil and lowering the heat to a simmer, stir continuously.
After adding the salt and pepper, boil the mixture for 6–7 minutes, or until the soup thickens. If it's too thick for you, thin it out with a little broth or extra milk. Warm up the food.