controller.diff

 class EventsController < ApplicationController
   def index
+    @events = [Event.new]
   end
 end

controller.rb

class EventsController < ApplicationController
  def index
  end
end

Rails.application.routes.draw do
  resources :events, only: :index
end

event.rb

class Event
  def visitor
    User.last # hardcoded for now
  end

  def action
    "liked" # hardcoded for now
  end

  def recipe
    Recipe.last # hardcoded for now
  end

  def featured_visitor_recipe
    visitor.recipes.last # undecided how to feature a recipe
  end
end

index.html.erb

<% 3.times do %>
  <div class="media">
    <%= image_tag "dummy_user.jpg", class: "media__img" %>
    <div class="media__body">
      Sebastian
      <p class="meta">
        liked <%= link_to "Quick Pizza Dough", "#" %>
      </p>

      <div class="attachment media">
        <%= image_tag "food.jpg", class: "media__img" %>
        <div class="media__body">
          <h3 class="recipe-title">
            <%= link_to "Grilled Aubergines", "#" %>
          </h3>
        </div>
      </div>

      <p class="subtle">Try out their latest recipe</p>
    </div>
  </div>
<% end %>

migration.rb

class CreateEvents < ActiveRecord::Migration[5.2]
  def change
    create_table :events do |t|
      t.references :visitor, null: false
      t.references :recipe, null: false
      t.integer :action, null: false
      t.timestamps
    end
  end
end

model+controller.diff

@@ Model @@

-class Event
-  def visitor
-    User.last
-  end
-
-  def action
-    "liked"
-  end
-
-  def recipe
-    Recipe.last
-  end
+class Event < ApplicationRecord
+  belongs_to :visitor, class_name: "User"
+  belongs_to :recipe
+  enum action: %i(liked)

   def featured_visitor_recipe
     visitor.recipes.last
     
@@ Controller @@

 class EventsController < ApplicationController
   def index
-    @events = [Event.new]
+    @events = Event.all
   end
 end

test-2.diff

 scenario "Viewing events" do
   visitor = User.create!(name: "Visitor Name")
   visitor.recipes.create!(title: "Featured Visitor Recipe")
-  Recipe.create!(title: "Visited Recipe")
+  visited_recipe = Recipe.create!(title: "Visited Recipe")
+  Event.create!(visitor: visitor, recipe: visited_recipe, action: :liked)

test.diff

 scenario "Viewing events" do
+  visitor = User.create!(name: "Visitor Name")
+  visitor.recipes.create!(title: "Featured Visitor Recipe")
+  Recipe.create!(title: "Visited Recipe")
+
   visit events_path

-  expect(page).to have_text "Grilled aubergines"
+  expect(page).to have_text "Visitor Name"
+  expect(page).to have_text "Featured Visitor Recipe"
+  expect(page).to have_text "liked Visited Recipe"
 end

test.rb

scenario "Viewing events" do
  visit events_path

  expect(page).to have_text "Grilled Aubergines"
end

view.diff

-<% 3.times do %>
+<% @events.each do |event| %>
   <div class="media">
-    <%= image_tag "dummy_user.jpg", class: "media__img" %>
+    <%= image_tag event.visitor.avatar, class: "media__img" %>
     <div class="media__body">
-      Sebastian
+      <%= event.visitor.name %>
       <p class="meta">
-        liked <%= link_to "Quick Pizza Dough", "#" %>
+        <%= event.action %> <%= link_to event.recipe.title, event.recipe %>
       </p>

       <div class="attachment media">
-        <%= image_tag "food.jpg", class: "media__img" %>
+        <%= image_tag event.featured_visitor_recipe.image, class: "media__img" %>
         <div class="media__body">
           <h3 class="recipe-title">
-            <%= link_to "Grilled Aubergines", "#" %>
+            <%= link_to event.featured_visitor_recipe.title, event.featured_visitor_recipe %>
           </h3>
         </div>
       </div>