Sauté the onion and tomato

• Heat the olive oil in a frying pan and add the red onion.
• Stir in the tomato and let it cook down until softened.

Add the beans and garlic

• Add the roasted garlic and butter beans.
• Season with salt and pepper and stir well.

Melt the mozzarella

• Scatter the grated mozzarella over the beans.
• Cover with a lid and let the cheese melt.

Toast the bread

• Toast the bread slices until golden and crisp.

Assemble the toast

• Spread mayonnaise on the toast and top with mashed avocado.
• Spoon the beans over the avocado and finish with a fried egg.