Chop the pineapple into bite-sized chunks.
Cut the cucumber into half-moon slices or small cubes.
Thinly slice the red onion and jalapeño if you like a bit of heat.
Roughly chop the cilantro and crumble the feta cheese if using.
In a small bowl, whisk together lime juice, honey or maple syrup, olive oil, salt, black pepper, and red pepper flakes until well combined.
In a large mixing bowl, toss together the pineapple, cucumber, red onion, cilantro, and jalapeño.
Pour the dressing over the salad and gently toss to coat all ingredients evenly.
Top the salad with crumbled feta cheese if desired.
Serve the salad immediately or place it in the refrigerator for 15 to 30 minutes to let the flavors marry.
Garnish with extra cilantro or a splash of lime juice before serving for a bright finish.