I've been going to Curry Zen for several years now. It's a great place to get delicious curry.
You choose a base ingredient for your curry and then, you can add extra toppings if you like. You also choose the level of spiciness; I usually get Zero Spicy Level since I'm weak against spiciness.
I normally order a Scrambled Egg & Spinach Curry with a Croquette, but last time I went, I ordered a Croquette Curry with Scrambled Eggs and Cheese. Tomato comes with the Scrambled Eggs. They also have other food such as Curry Udon, Naan Bread, and etc. I really enjoy their Takoyaki~ The Takoyaki has a nice crunchy, but soft texture.
You can also choose to order a half curry plate which are smaller than the normal plate at Curry Zen. It's in the same area as Monta, Kungfu Tea, Hwaro, and Sweet Raku.