Place a saucepan over a medium heat. When the pan is hot, add the chorizo and fry for 1-2 minutes, or until starting to crisp.
Add the drained chickpeas and tinned tomatoes, then stir in the thyme. Season, to taste, with salt and freshly ground black pepper. Simmer for 4-5 minutes, or until the sauce has warmed through and thickened to your liking.
To serve, spoon the chickpea mixture on top of the toast and garnish with parsley.