Diet Recipe: Rosemary Roast Potatoes


Simple, filling and SO tasty, diet roast potatoes that beat the regular ones! – 203 calories / Syn Free / 8 Smart Points. This is my go-to side dish. Making butterfly chicken with thyme? Add rosemary roast potatoes. Making a steak sous vide? Add rosemary roast potatoes. Don’t fancy cooking? Make a big batch of rosemary roast potatoes. Doing pasta? OK maybe not.

These potatoes are tasty enough to have on their own, which allows them to really lift up any meal with a side that is delicious. And did I mention they’re diet friendly? Potatoes are syn free on Slimming World so a no-brainer.

Preparation time
5 min
Cooking time
50 min
Total time
55 min


This recipe uses some UK names. Hover over the translation icon or use the Translations for Cooking Terms, Ingredients and Measures page for US equivalents.

Buy fresh
500 g Baby new potatoes
2 stalks Fresh rosemary
From the pantry
Course or flaked salt US: Kosher salt
4 Garlic cloves
Low calorie cooking spray

Diet friendly

These potatoes are great for any meal, at just over 200 calories they’re not going to upset your diet. Syn free on Slimming World and only 8 Weight Watchers Smart Points, so fill up!

Nutrition Facts for Rosemary Roast Potatoes: 203 calories, syn free, 8 smart points

Method – brief

  • Par-boil the potatoes for approx. 15 minutes
  • Let the potatoes cool, then spray with cooking spray and sprinkle with chopped rosemary and sea salt.
  • Bake in the oven together with the garlic for 30-35 minutes at 200°C (390F)

Method – detail

Preparing the ingredients

  • Finely chop the rosemary


  • Add the potatoes to a large pan and cover with water.
  • Set on a high heat and bring to a boil. Cook for a total of approx. 15 minutes.

Tip: When potatoes are done you can stick a fork into them with almost no resistance. As they’re going in the oven these don’t quite need to be that done, but you should feel they’re not raw anymore.

  • Drain the potatoes and set aside to let them cool for 5 minutes.
  • Meanwhile pre-heat the oven to 200°C (390F)
  • In a bowl spray the potatoes with cooking spray and sprinkle with rosemary and course salt. Mix together well.
  • Spread the potatoes out onto a baking tray US: Baking sheet together with the garlic cloves, and bake for 30-35 minutes, until the outside has gone crispy.


Unfortunately a lot of the crisping that you get with non-diet recipes is due to the fat used in cooking. For that reason, potatoes baked with cooking spray such as Frylight will never get quite as crispy. The course salt gives some crunch to these, and I bet you won’t mind that they’re not as crispy once you taste them!

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