Final answer:
The correct verb form to fill in the blank is 'gustan', as it matches the plural noun 'las enchiladas'.
Step-by-step explanation:
The correct answer is gustan. The sentence requires the plural form of the verb 'gustar' to match the plural noun 'las enchiladas'. 'Gustan' is the third person plural form of 'gustar', which is used when the subject of the sentence is plural and the thing being liked (in this case, 'enchiladas') is plural as well.
Learn more about Verb forms in Spanish