Rinse the cucumber and red bell pepper. Cut the cucumber in half lengthwise, scrape out the watery seed core with a spoon, and dice the flesh into small, equal-sized pieces. Remove the stem and seeds from the red bell pepper and dice it into pieces of the same size.
Place the cottage cheese in a bowl and gently break it up with a spoon. Add the diced cucumber and pepper and carefully fold everything together so the vegetables are evenly distributed throughout the cheese.
Season the mixture by adding the chili powder, some salt, and freshly ground black pepper. Stir everything together once more and taste to check the seasoning. Place the bowl in the refrigerator for five to ten minutes to let the flavors meld.
Remove the chilled mixture from the refrigerator. Transfer the prepared cottage cheese to a clean bowl or divide it directly among plates and serve immediately.