Spicy Bloody Mary eggs with crunchy croutons

Name: Spicy Bloody Mary eggs with crunchy croutons
Ingredients: 2 red onions 1 sliced into rings, 1 finely chopped; juice of ½ lemon or lime; 1 tbsp sugar plus a pinch; splash of vodka (optional); 3 tbsp olive oil; 1 stick celery finely chopped, plus leaves to garnish; 2 large garlic cloves chopped; 2 red peppers sliced; 2 x 400g cans chopped tomatoes; 1 tbsp red wine vinegar; 3 red chillies; 2 chunky slices of stale bread such as sourdough or ciabatta, torn into chunks; 5-10 shakes of Tabasco to taste; 8 eggs; 150g Greek-style yogurt; drizzle of extra virgin olive oil to serve