In the same saucepan over medium heat, melt the butter. Add the minced garlic and cook until fragrant (about 1 minute), then add the flour and whisk until smooth. Slowly add the milk while whisking constantly, until smooth. Continuing to whisk, slowly add the #HAPPY_COW_CHEESE until smooth. Add the chicken, oregano, and tomato to the cheese sauce and stir to combine. Stir in the egg and mix well.