Healthy veggie platter

Name: Healthy veggie platter
Ingredients: 1 lemon; 1 large red pepper, deseeded and quartered; 1 large courgette (about 225g), sliced into rounds the thickness of a £1 coin; 1 tbsp olive or rapeseed oil, plus a drizzle (under 1 tsp); 400g butter beans, drained, liquid reserved; 1 tbsp tahini; 1 garlic clove; 2 cooked beetroot (not in vinegar), sliced (165g); 1 tbsp chopped dill; ½ small red onion, finely chopped; 100g natural yogurt; a pinch of smoked paprika; 6 pitted Kalamata olives, halved; handful of mint leaves, chopped if large; extra virgin olive oil for drizzling, (optional)