Pre-heat the oven to 200°C and chop the garlic, onion, carrots and potato.
Spray the top of the chicken with low calorie cooking spray and place into the middle of the preheated oven. The chicken will take 30-40 minutes to cook depending how thick the breasts are.
Once the potato and carrot for the sauce have cooked through, add the sweetener and use a hand blender to liquify the contents of the saucepan. A top tip is to blend twice as long as you think, you want the sauce to be super smooth! If the sauce seems too thick at this point, add some more water a little at a time until you reach the consistency you want. If it seems a little thin, reduce it on a low heat. This is all down to personal preference so don't worry about getting it wrong!