Answer:
Between the subject "I" and the verb "teach" the auxiliary verb "will" is missing in order to correctly use the simple future tense. The usage of 'less' instead of 'fewer:' AMD the misspell of the word palate.
Explanation:
The simple future tense is used to refer to which expected to occur in the future, but haven't happened yet.
The formula for this verb tense is always the same, no matter if the subject of the sentence is either singular or plural, and it is as follow:
subject + will + [root form of verb].
Bearing the explained above in mind in order to correct the error in the example provided it necessary to place "will" between the subject and the root form of the verb; that is to say:
In today's blog post, I WILL teach you how to make watermelon salad with feta and mint! With fewer than five ingredients, it's a feast for the eyes and the palate!