Place the jamiaca flowers in a bowl along with the garlic, oils, vinegar, salt, sugar and pepper. Let them sit for a few minutes, for the flowers to soften up a bit. Then pour everything into a blender and puree. The flowers will not be pureed until smooth. The mix will have a textured consistency with chewy flower chunks: that’s what you want!
Let the mix stand for at least two hours. If it will not be used then, it can be kept in the refrigerator, covered, for up to a week.
Place the spinach and watercress in a large bowl. Pour some of the vinaigrette on top and toss. Top with the chopped caramelized pecans and sprinkle the scallions over the top. Drizzle some more vinaigrette on top. If you have leftover vinaigrette, you can eat it with a spoon!