Preheat your oven to 375°F (190°C).
In a large skillet, heat olive oil over medium heat and add the minced garlic.
Add chicken breasts to the skillet, cooking until browned on both sides (about 6-8 minutes per side).
Remove chicken from skillet, dice it into bite-sized pieces, and set aside.
In the same skillet, add cauliflower and broccoli florets, sautéing until tender (about 5 minutes).
In a large bowl, combine diced chicken, sautéed vegetables, heavy cream, and seasoning, mixing well.
Transfer the mixture into a greased baking dish and top with shredded cheddar cheese.
Bake in the preheated oven for 25-30 minutes, until golden and bubbling.