First thing to do is to saute the shrimp, heat a splash of olive oil and two tablespoons of butter in a large non stick skillet and add the shrimp, I used medium size whites, these are not deveined.
Stir often as the shrimp start turning pink.
When all the shrimp are pink, remove the pan from the stove (this is sitting on my counter top) and remove the shrimp to a bowl or plate.
Prepare the vegetables. I used one each, onion, potato, and a carrot. Good way to dice potatoes and carrots, use a french fry cutter, cut the vegetables into strips then chop with a knife to dice.
Using the same pan, discard the liquid, heat another two tablespoons of butter then add the onion until softened and starting to brown, then add the rest of the vegetables and the water. Bring to a boil, and reduce to a simmer and cover, stirring occasionally, for about 10-15 minutes or until the vegetables are tender, then add the shrimp back to the pan and let the shrimp warm through for a few minutes. Remove the pan from heat.
Stir in the curry paste block and stir until it is dissolved and mixed in. Return to heat and gently simmer for another 5 minutes. I also added hard boiled quail eggs.
This is the only brand of Japanese Curry I use, Golden Curry and is what I am using here.
And no kidding, it looks like a chocolate bar. This 100 grams of curry paste, it is solid not a paste you are familiar with. Golden curry comes in 100 gram and 200 gram packages.
Serve with rice. For the rice I used a yellow Saffron rice. Delicious!