Bean goulash with mustard mash

Ingredients

• 600g new potatoes (about 18 medium-sized), washed & halved
• 2 tablespoons olive oil
• 3 teaspoons wholegrain mustard
• 2 teaspoons olive oil
• 1 medium onion, finely diced
• 1 teaspoon smoked paprika
• 1–2 cloves garlic, finely diced
• 1 x 400g can chopped tomatoes
• 200ml reduced-salt vegetable stock
• 100g mushrooms, roughly chopped
• 1 x 400g can mixed beans, drained and rinsed