how to wrap excerpt in tag and title in H3?

I want to be able to wrap the excerpt in a p tag, and the title in H3 so I can separate them… I have a custom template, just unsure of how to make them work,

//Show the title and link to the post:
  $lcp_display_output .= $this->get_post_title($post, 'h3', 'lcp_post');

  //Show comments:
  $lcp_display_output .= $this->get_comments($post);

  //Show date:
  $lcp_display_output .= ' ' . $this->get_date($post);

  //Show date modified:
  $lcp_display_output .= ' ' . $this->get_modified_date($post);

  //Show author
  $lcp_display_output .= $this->get_author($post);

  //Custom fields:
  $lcp_display_output .= $this->get_custom_fields($post);

  //Post Thumbnail
  $lcp_display_output .= $this->get_thumbnail($post);

  /**
   * Post content - Example of how to use tag and class parameters:
   * This will produce:<p class="lcp_content">The content</p>
   */
  $lcp_display_output .= $this->get_content($post, 'p', 'lcp_content');

https://wordpress.org/plugins/list-category-posts/