Dice yellow onion
Peel aubergine and dice in to small pieces.
Finely chop the mushrooms.
Cook onion, aubergine and mushroom in oil in a sauteuse or other wide brim pot for 5 minutes.
Halve cherry tomatoes.
Add flour and stir into aubergine mix, cook for 1 minute.
Add tomato sauce/passata, bouillon cube, water and halved tomatoes.
Stir to mix all ingredients and to dissolve flour.
Add the uncooked pasta to the pot with salt and oregano. Stir to combine.
Place a lid on the sauteuse and let simmer for 12 minutes. Stir every now and then so pasta does not stick to the bottom.
Check pasta is al dente. Your type of pasta will decide the cooking time.
Turn off the heat and add in diced blue cheese and shredded cheddar cheese, stir until melted.
Serve while hot.